GeneralAire Humidifier filter GeneralAire 40 Parts, Filters

Your model GeneralAire 40 uses the 7140 GeneralAire 40-7 Humidifier Speed Nut The GeneralAire 40-7 Humidifier Speed Nut fits the following models of humidifiers:
GeneralAire 40
GeneralAire 81
This GeneralAire 40 series humdifier part is a speed nut for the humdifier. The GeneralAire 40-7 speed nut is also known as Gen